@inproceedings{,
    author = {Muth, Bastian; Bindl, Stefan; Brehm, Sebastian; Niehuis, Reinhard},
    title = {Adjusting the Ejector Effect inside a Jet Engine Ground Test Facility - CFD Prediction and Validation},
    editor = {},
    booktitle = {Proceedings of the XXI. International Symposium on Air Breathing Engines (ISABE), September 9-13, 2013, Busan, Korea},
    series = {},
    journal = {},
    address = {},
    publisher = {},
    edition = {},
    year = {2013},
    isbn = {},
    volume = {},
    number =  {},
    pages = {12},
    url = {},
    doi = {},
    keywords = {},
    abstract = {Recently a modern jet engine of the
latest generation has been put into
service at the engine test facility
operated by the Institute of Jet
Propulsion of the University of the
German Federal Armed Forces Munich.
But because of the fact, that the primary
mass flow of the new MexJET engine
is exceeding the mass flows of the
already installed jet engines by more
than twice it could not be accelerated
beyond a certain power setting. At
this operating point, too high velocities
within the sound absorber cascades
of the test facility have been
observed. This physical value is directly
related to the strength of the
ejector effect which establishes due
to the hot exhaust gas plume of the engine.
As it has been shown in previous
studies, the entrainment of secondary
air could be controlled by reducing
the effective diameter of the
detuner. Thus the application of an
orifice plate on the existing chutedetuner-
assembly of the facility was
considered. But too low secondary air
can cause adverse flow phenomena such
as hot gas recirculation. Therefore,
extensive numerical simulations have
been conducted to ensure safe engine
operation up to maximum power setting.
These included different simulations
of the effectiveness of the orifice plate and validation of the
CFD-model with an already operated engine.
Based on the validated simulations,
predictions of the test cell
aerodynamics with the new test vehicle
have been made with special emphasis
on the limits of the facility and
indications for adverse flow phenomena.
It is shown that the measures were
successful and the new engine can now
be safely used over its entire power
range.},
    note = {},
    institution = {Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik, LRT 12 - Institut für Strahlantriebe, Professur: Niehuis, Reinhard},
    
    
}